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skills/cohort-analysis/SKILL.md

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+---
+name: cohort-analysis
+description: Standard method for slicing bookings, pipeline, and retention cohorts
+  for diagnostics.
+---
+
+# Cohort Analysis Framework Skill
+
+## When to Use
+- Comparing performance across acquisition channels, segments, or product lines.
+- Diagnosing conversion drop-offs within specific booking/vintage cohorts.
+- Stress-testing forecast assumptions with historical baseline behavior.
+
+## Framework
+1. **Cohort Definition** – choose cohort key (signup month, lead source, product tier, segment).
+2. **Metric Stack** – select KPIs (coverage, win rate, ACV, NRR, payback) per cohort.
+3. **Normalization** – adjust for seasonality, deal size mix, or currency.
+4. **Visualization** – waterfall tables, heatmaps, or overlapping curves to highlight divergence.
+5. **Narrative Layer** – annotate drivers, anomalies, and recommended actions.
+
+## Templates
+- Cohort definition worksheet (keys, filters, inclusion/exclusion rules).
+- Standardized chart pack for leadership readouts.
+- Diagnostic checklist for follow-up analyses.
+
+## Tips
+- Keep cohorts mutually exclusive to avoid double-counting.
+- Pair with `inspect-pipeline-levers` to link cohort insights to pipeline stages.
+- Rebaseline quarterly so assumptions stay current.
+
+---